Urashima, an island floating on the ocean far away from the mainland. Urashima is often mistakenly viewed as a paradise, overflowing with nature. However, a difficult past and long-established customs keep the people of this living island prisoners. The residents of this living island have accepted that they have been abandoned by the mainland and are gradually being forgotten about. Then, one day, a boy drifts to the island, and he refers to himself as a “time traveler” named Setsuna. Setsuna has not a single memory left other than that he has a “certain mission” that he must do. He then meets three girls named Rinne, Karen, and Sara. Eventually, he begins efforts to change the future of the island. The story of this boy and these girls will untie the cord around the exclusive customs and various mysteries that surround Urashima.

[ua_character name="Rinne Ohara" voice="Yukari Tamura" desc="Main Character 01 Rinne is the daughter and heir to the Mihara family, one of the three families on Urashima. A shut-in, Rinne is a night owl who stubbornly refuses to go outside during the day. Her hobby is going for walks at night. She appears to know something about Setsuna, but she is tight-lipped about it. It is rumored that approximately five years ago, she was spirited away, however no one dares to speak about it." img='']

[ua_character name="Karen Kurutsu" voice="Kana Asumi" desc="Main Character 02 Karen is the daughter of the head of the island. Karen has a strong-minded way of speaking, and is at the height of her rebellious phase where she has tried to run away from home and leave the island multiple times. Karen was a late bloomer when it comes to romance, and so Setsuna messes with her a lot. She is working vigorously towards her dream of leaving Urashima for the mainland. Karen believes Setsuna to be a mainlander and is extremely curious about him." img='']

[ua_character name="Sara Garandou" voice="Hibiku Yamamura" desc="Sara believes that Setsuna is someone from the future and thus some sort of enemy, so she is always trying to off him. She believes that there are some things that cannot be explained by science. Sara lost both of her parents in a fire five years ago, and while searching for the truth behind their deaths, she is starting to realize the true meaning of her own ‘destiny.’" img='']

[ua_character name="Setsuna Sanenkai" voice="Tatsuhisa Suzuki" desc="Setsuna is a mysterious boy who washed up on the sandy beaches of the island completely naked. Carrying the responsibility of an order to ‘save the world,’ he claims that he has come from the future. This is the only memory that he currently has as he has lost all other essential ones. He cannot even recall who he is or from where he came, but he is an optimist who is carefree and does not think too hard about things." img='']

[ua_character name="Mei Tandori" voice="Yui Nakajima" desc="Aoi is a slender, committee chairman-type. She wears black stockings even in summer. She’s an honors student and is a fountain of knowledge, but she can be so detailed that things often go right over An and Emiri’s heads." img='']

[ua_character name="An Hatoma" voice="Tomoyo Takayanagi" desc="An is the boyish vice president of the photography club. Ever since she was little, she has always had her Leica camera with her to take photos. She’s interested in everything, but this firecracker is also incredibly quick to forget. There’s a higher chance she’ll take a photo of something if it involves a small animal or a beautiful girl." img='']

[ua_character name="Emiri Sunada" voice="Takako Tanaka" desc="Emiri is the mascot glasses character who fakes ignorance. When she pretends to not know something, Mei and An pick her up on it. Despite that, she is the most interested in romance between the three of them. Unbeknownst to others, she greatly worries about how soft her tummy and thighs are." img='']